Question

A contractor can finish building a house in 60 days, while his assistant can finish it in 90 days. If they work together for 15 days, what fraction of the work is remaining?

• A. $\frac{5}{12}$
• B. $\frac{7}{12}$
• C. $\frac{2}{3}$
• D. $\frac{1}{2}$

Answer 1

Answer: (B)

$\frac{7}{12}$

Answer 2

The correct option is (B): $\frac{7}{12}$